综合物探方法在铜陵矿集区北部矿产勘查中的应用

Application of comprehensive geophysical prospecting method in mineral exploration of northern Tongling ore-concentrated area

为探索铜陵铜官山与狮子山矿田北延的可能性,通过高精度磁法测量并结合航磁和重力资料,了解区内地层、构造、岩浆岩分布状况;结合典型矿床及周边矿床情况,划分并筛选靶区;布置重力、磁法、电法综合物探剖面,了解地质体空间分布状况,结合面积重磁解译构造;在综合剖面显示有利地段布置大功率激电测深,圈定高极化范围,联合反演优选位置钻探验证。结果显示:姚汪村重点区岩体由铜官山延伸而来,深部有寻找矽卡岩型多金属矿床的潜力;西湖老家崔重点区为铜官山航磁异常北延部分,深部存在成矿的可能,是寻找接触交代型铜金铁矿的有利场所;张家湾重点区为叶家湾航磁异常北延部位,深部存在偏中性的侵入体,具备接触交代型、层控矽卡岩型铜金铁成矿条件。

In order to explore the possibility of the north extension of Tongguanshan and Shizishan ore fields in Tongling,the distribution of strata,structure and magmatic rocks in the area were studied with high-precision magnetic measurement and aeromagnetic and gravity data.According to the typical deposit and the surrounding deposits,the target area was divided and screened.The gravity,magnetic and electrical geophysical profiles were arranged to present the spatial distribution of geological bodies,and to interpret structures with gravity magnetic survey.High-power IP sounding was arranged in the favorable section of the comprehensive section to delineate the range of high polarization,and the drilling verification of the joint inversion optimal position was conducted.The results show that the rock mass in the key area of Yaowang Village extends from Tongguanshan,and there is a potential of searching for skarn-type polymetallic deposits in the depth.The Laojiacui key area in West Lake is the north extension part of Tongguanshan aeromagnetic anomaly,which is a favorable place to look for contact metasomatic copper-gold iron deposit in the depth.The key area of Zhangjiawan is located in the north extension of Yejiawan aeromagnetic anomaly,and there are relatively intermediate intrusive bodies in the deep part,which favors for the formation of contact metasomatic and strata-controlled skarn-type copper-gold iron deposit.